leaflets
the "leaves" that make up a compound leaf.
leaf primordia
The early, precursor cells of a leaf.
Bipinnately compound leaves are twice divided: the leaflets are arranged along a secondary vein that is one of several branching off the rachis. Each leaflet is called a "pinnule". The pinnules on one secondary vein are called "pinna"; e.g.
compound leaf A leaf in which the blade forms small leaflets. Compound leaves that have several small leaflets originating from a central axis are termed pinnately compound; example: rose.
simple leaf A leaf in which the blade does not form leaflets.
sink A body or process that acts as a storage device or disposal mechanism; e.g., plants and the oceans act as sinks absorbing atmospheric carbon dioxide.
palmate An arrangement of leaflets (or lobes on a simple leaf), each originating from a common point, usually the axial end
palmately compound leaf Leaflets radiating from a common point.
Palpebrae Eyelid.
The photo shows the sori on the underside of the leaflets of the Christmas fern.
The Gametophyte Generation
If a spore is blown to a suitable moist location,
It germinates into a filament of cells.
This grows into a prothallus with ...
compound leaves -- n. Leaves with two or more leaflets attached to a single leaf stem.
compression -- Fossil formed when an organism is flattened (compressed) and a thin film of organic material from its body is left in the rock.
(Science: botany) Sleep of plants, a state of plants, usually at night, when their leaflets approach each other, and the flowers close and droop, or are covered by the folded leaves.
Synonym: Slumber, repose, rest, nap, doze, drowse.
vein banding. Dark brown discoloration of the veins on the undersides of potato leaflets caused by potato virus Y.
véraison. Beginning of fruit ripening, recognized by berry softening and beginning of pigmentation in colored varieties.
It is quadrilateral in form, and is placed at the junction of the right and middle leaflets of the central tendon, so that its margins are tendinous.
 See also: Plant, Cells, Trans, Tissue, Class
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